near to Monmouth/Trefynwy, Monmouthshire/Sir Fynwy, Great Britain

Grade II listed Tollgate House near Mitchel Troy

Located at the Y-junction of B4293 (to Chepstow) on the left and the road to Mitchel Troy (formerly the A40, now unclassified). Tollgate House was grade II listed in April 1992.
I do not know long the house operated as a toll house, but tolls on turnpike roads were abolished in the UK in 1872, after which the roads were maintained by local authorities.